/****************************************************************************
**
** Copyright (C) 2008-2008 Trolltech ASA. All rights reserved.
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file.  Alternatively you may (at
** your option) use any later version of the GNU General Public
** License if such license has been publicly approved by Trolltech ASA
** (or its successors, if any) and the KDE Free Qt Foundation. 
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/. If
** you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** In addition, as a special exception, Trolltech, as the sole
** copyright holder for Qt Designer, grants users of the Qt/Eclipse
** Integration plug-in the right for the Qt/Eclipse Integration to
** link to functionality provided by Qt Designer and its related
** libraries.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly
** granted herein.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#ifndef MODELMENU_H
#define MODELMENU_H

#include <QtGui/QMenu>
#include <QtCore/QAbstractItemModel>

// A QMenu that is dynamically populated from a QAbstractItemModel
class ModelMenu : public QMenu
{
    Q_OBJECT

signals:
    void activated(const QModelIndex &index);
    void hovered(const QString &text);

public:
    ModelMenu(QWidget *parent = 0);

    void setModel(QAbstractItemModel *model);
    QAbstractItemModel *model() const;

    void setMaxRows(int max);
    int maxRows() const;

    void setFirstSeparator(int offset);
    int firstSeparator() const;

    void setRootIndex(const QModelIndex &index);
    QModelIndex rootIndex() const;

    void setHoverRole(int role);
    int hoverRole() const;

    void setSeparatorRole(int role);
    int separatorRole() const;

    QAction *makeAction(const QIcon &icon, const QString &text, QObject *parent);

protected:
    // add any actions before the tree, return true if any actions are added.
    virtual bool prePopulated();
    // add any actions after the tree
    virtual void postPopulated();
    // put all of the children of parent into menu up to max
    void createMenu(const QModelIndex &parent, int max, QMenu *parentMenu = 0, QMenu *menu = 0);

private slots:
    void aboutToShow();
    void triggered(QAction *action);
    void hovered(QAction *action);

private:
    QAction *makeAction(const QModelIndex &index);
    int m_maxRows;
    int m_firstSeparator;
    int m_maxWidth;
    int m_hoverRole;
    int m_separatorRole;
    QAbstractItemModel *m_model;
    QPersistentModelIndex m_root;
};

#endif // MODELMENU_H

